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https://issues.apache.org/jira/browse/HIVE-23665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17146476#comment-17146476
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Ramesh Kumar Thangarajan commented on HIVE-23665:
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[~jcamachorodriguez] [~vgarg] Can you please review the attached PR and let me
know your thoughts?
> Rewrite last_value to first_value to enable streaming results
> -------------------------------------------------------------
>
> Key: HIVE-23665
> URL: https://issues.apache.org/jira/browse/HIVE-23665
> Project: Hive
> Issue Type: Bug
> Reporter: Ramesh Kumar Thangarajan
> Assignee: Ramesh Kumar Thangarajan
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-23665.1.patch, HIVE-23665.2.patch,
> HIVE-23665.3.patch
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Rewrite last_value to first_value to enable streaming results
> last_value cannot be streamed because the intermediate results need to be
> buffered to determine the window result till we get the last row in the
> window. But if we can rewrite to first_value we can stream the results,
> although the order of results will not be guaranteed (also not important)
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